Cascades effects on the polarization properties of x-ray radiation emitted by electron-impact excitation of highly charged He-like Fe24+ ions

29th International Conference on Photonic, Electronic, and Atomic Collisions

Chen, Z.B.^1,2 ; Dong, C.Z.^1 ; Jiang, J.^1

Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou

730070, China^1

College of Science, National University of Defense Technology, Changsha, Hunan

410073, China^2

关键词: Distorted wave methods;    Electron-impact excitation;    Linear polarization;    Magnetic sublevels;    Polarization measurements;    Polarization properties;    X ray radiation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/5/052039/pdf
DOI  :  10.1088/1742-6596/635/5/052039

来源: IOP

【 摘 要 】

Detailed calculations using a fully relativistic distorted-wave method are carried out for the electron-impact excitation cross sections from the ground state 1s2(J= 0) to the individual magnetic sublevels of the excited state 1s2s1/2(J= 1) of highly charged He-like Fe24+ions. The cascades effects to the cross sections and the linear polarizations of the 1s2s1/2(J= 1) → 1s2(J=0) line are investigated systematically. Our results show that the 1s2p, 1s3l, and 1s4l (l = s, p, d) excited states have significant effects and make the cross sections increase. These influences also lead to a remarkable decrease in the linear polarization of subsequent x-ray radiation. The present results agree with the previous theoretical results and the polarization measurements very well.